| RRP run, item selectionThis section describes how LN selects the items to
plan in the Generate Order Planning (cprrp1210m000) session and the Generate Order Planning (Item) (cprrp1220m000) session. Net-change planning For each plan item, LN records if a change has occurred since the
last simulation, for example, a change in the bill of material or changed
demand figures. LN also
records the earliest date on which a change has occurred ( net change date). You can have the order-planning sessions to plan only the items
for which planning data changed since the last planning run. Bottom-up item selection To investigate the effects of a change in availability of some
critical component that is used in many end products, you can use the bottom-up
item-selection feature. In a bottom-up planning run, the LN plans every item that
somehow relies on the availability of the originally selected plan item. Top-down item selection To perform a complete planning run for some high-priority sales
order, for example, for a sophisticated customized (engineer-to-order) end
item, you can use the top-down item-selection feature. In a top-down planning run, LN plans every purchased
item and subassembly of which the timely availability can influence the
production of the originally selected plan item. Restrictions LN applies the following restrictions to the selection of plan items, for which LN generates the order
planning: - LN only
includes plan items that you defined on the specified plan level.
- Bottom-up item selection does not work for items with a standard-to-order (STO) structure.
- Both top-down and bottom-up select the related items on one site. The selection algorithm stops as soon as it
encounters a site change.
Selection procedure LN determines the set of plan items to plan in the following way: Selection range LN selects the plan item you specified in the Generate Order Planning (Item) (cprrp1220m000) session or the range of plan items you
specified in the Generate Order Planning (cprrp1210m000) session. Bottom-up selection If you select the Include Parent Items check box, for the selected plan items, LN also includes the
following items: - Parent items on the bill of material (BOM).
- Receiving items specified in the Supplying Relationships (cprpd7130m000) session.
- Parent items on the generic bill of material (BOM) for the generic items
included in the item range.
- Derived items: The project items for which you created a
project in the Project Control module in Manufacturing.
Alternatives
The bottom-up selection works in a multilevel way. For
example, LN also selects
the parent item of the parent item, up to the end items that can be sold to
customers. Top-down selection If you select the Include Child Items check box, for the selected plan items, LN also includes the
following items: - Components on the bill of material.
- Supplying items that you specified in the Supplying Relationships (cprpd7130m000) session.
- Components on the generic bill of material (BOM), for the
generic items included in the item range.
Derived-from items: The generic or normal items that you
use to create project items in the Project Control (PCS) module of
Manufacturing, and from which the project items included in the specified item
range are derived. If, during the order-based planning, the project
structure of a project item must be built up, this also works together with the
top-down item selection algorithm. For example, if during order-based planning, LN finds out that supply
must be generated for project item PX, LN copies the structure
of item X. In that case, LN must also create new project items. These
newly created project items are also taken into account during the planning. Alternatives
The top-down selection works in a multilevel way. For
example, LN also selects
the components of the components, up to the purchased parts. Restrictions LN applies the restrictions listed previously under "Restrictions" to the plan
item selection. - If you selected the Run a Net Change Planning check box, LN restricts the planning
run to plan items of which the planning parameters, or item structure has
changed since the previous order-planning run. For details, refer to Net-change simulations.
Phantom items If the Inherit Warehouse if Parent Item is a Phantom check
box in the Bill of Material (tibom1110m000) session is selected for any of the selected
plan items, Enterprise Planning selects plan items for all clusters for the material. For more information, refer
to Direct material supply (DMS)
For examples of this procedure, refer to Item selection in order planning, examples. | |